There is a hidden folder that stores a cached index of BigFile.000 . If this index is corrupted, the game crashes even if the main file is fine.
The "Unable to open bigfile bigfile.000!" error in Rise of the Tomb Raider is a frustrating roadblock that typically indicates the game launcher cannot access or read its core data archives. This usually happens due to , permission conflicts , or antivirus interference . rise of the tomb raider bigfile000 error better